The bottom line is clear: Our vital interests in Afghanistan are limited and military victory is not the key to achieving them. On the contrary, waging a lengthy counterinsurgency war in Afghanistan may well do more to aid Taliban recruiting than to dismantle the group, help spread conflict further into Pakistan, unify radical groups that might otherwise be quarreling amongst themselves, threaten the long-term health of the U.S. economy, and prevent the U.S. government from turning its full attention to other pressing problems. -- Afghanistan Study Group

The investigation, being conducted by the Iraqi government,
was launched after officials were confronted with numerous allegations
of “war crimes,” based in part on dozens of ghastly videos and still
photos that appear to show uniformed soldiers from some of Iraq's most
elite units and militia members massacring civilians, torturing and
executing prisoners, and displaying severed heads.

The U.S. has been "training" these forces for a decade, and they either drop their weapons and run when an enemy shows up, or they massacre civilians and torture prisoners. Maybe we should think of a different approach.

[A] military source said 22 soldiers had been killed when an aircraft,
which he said was from the U.S.-led coalition, bombed the headquarters
of an army company on the edge of Ramadi city, Anbar's provincial
capital. A military spokesman for the
coalition said it had carried out an air strike in the area on Wednesday
but that it had hit a position held by Islamic State fighters. "This strike did not result in any friendly casualties," Lieutenant Colonel Thomas Gilleran said.